Find My Age!

Algebra Level 1

When I was two years old, my sister was half my age. If I am now sixty years old, how old is my sister?


The answer is 59.

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39 solutions

David Ng
Jun 9, 2014

When the speaker was 2, the sister was 2 2 = 1 , \frac{2}{2}=1, so she is 1 year younger than the speaker. Now that the speaker is 60, the sister is 59.

When you're 2years old and other half of you mean 1 because1+1=2. Doesn't count days

Farshid eli - 3 years, 11 months ago

That was amazing

Margaret Marasigan - 2 years, 1 month ago

This problem makes total sense

Brook Lesko - 2 years ago

It didn’t count the days

Cielo Ortega puvaque - 1 year, 2 months ago

what i dont even get it witch type of half are you talking about half like 1/2(half of 60 is 30)

Mahdi Eftekhari - 1 year, 2 months ago

ummmm I don’t get it

Na Liu - 1 year, 1 month ago

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I don't get it. 😕

Am Kemplin - 1 month, 1 week ago

I don’t get it 😔

Emma Francis - 9 months, 2 weeks ago

I don't get it either😒😒😒😒😒😒😒😒😒😒😒😒😒😒😴

JOSÚE CAMPOS - 7 months, 3 weeks ago

Makes total sense

Andrew Cox - 5 months, 2 weeks ago

When you were 2 2 years old, your sister was 1 1 year old. Now that you are 60 60 years old, your sister must be 59 59 years old. The difference between your age and your sister's age is always o n e one .

Comment: If today you are 100 100 years old, then your sister is 99 99 years old.

The problem says "when i was 2 years old, my sister was half my age." 2/2 = 1, So wouldnt when theyre 60, their sister would be "half my age." which is 30? It didnt say that the difference of their ages was half of 2 years old. Putting that out there for the people who solved it like me. If we're talking about age, being 2 and your sister being 1, next year you would be 3 and your sister would be 2. So it would continue being a 1 year difference, so if your 60 your sister would be 59. I'm realizing that now.

Dylan Verderosa - 1 month, 3 weeks ago

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age isn't relative like if my brother is half my age he wouldn't be always half my age.

Oximas omar - 4 weeks ago
Vibha Sharma
Apr 9, 2015

when i was 2 years old then my sister was 2/2= 1 years old hence there is a difference of 1 year between them hence there age is 60-1=59 years

I thick this is absolutely correct

Francis Mayanglambam - 3 years, 11 months ago

Good explanation understand it clearly

Clifford Obruche - 8 months ago

Hey brother

Cassandra Paz Romero - 2 months, 3 weeks ago
Arslan Sajjad
Jun 13, 2014

when i was 2 year old she was 1year old( Half of me ).Means one year younger than me.Now i am 60 so,she definitely be 59 year old(still one year younger than me)

hahaha damn this question tricked me for real. wasnt expecting such an easy answer

Wabhatsha Jr. - 6 years, 10 months ago
Sharath Reddy
Jun 26, 2016

When i was 2 yrs old my sister was half (1/2) of my age => sisters age = 2/2=1yr. Means sister is 1 year younger than me => when i am 60 she will be 1 yr less => 59

That's right! Thanks for sharing your insight, Sharath. I upvoted your solution (+1)

Pranshu Gaba - 4 years, 11 months ago
Munem Shahriar
May 15, 2017

'When I was two years old, my sister was half my age'

Then, 2 × 0.5 = 1

She is one year younger then you so, when you are 60 years old your sister will be 59 years old.

you CRUMBS!

Am Kemplin - 1 month, 4 weeks ago
Mohammad Khaza
Jul 3, 2017

i was 2 .my sister was 1.

so, now i am60 and my sister is 59.

but that doesn't mean my sister will die 1 year after me. (just joking)

Anshika Sinha
Feb 11, 2018

When u r 2 years old then ur sister age is half..i.e 2/2=1 Now ur age is 60 years old then ur sister age is 59..means ur sister age is less than 1year compared to you.

death u Morons

Am Kemplin - 1 month, 4 weeks ago
Bruno Martel
Jan 31, 2021

When you're young 1 represent a lot of your total age, but when you get older one 1 year is much less in comparison,that's why time seems to pass so fast for old people

Jax Lincoln
Oct 16, 2017

His/her sister was 1 years old when he was two years old ( 2 2 \frac{2}{2} =1). Therefore, he is 1 year older than his/her. Since he is 60 years old, his sister is 59 years old. SIMPLE AS THAT!

Md Yeasin
Sep 18, 2017

the speaker said when he was 2 years old that's time her sister old 2-1= 1 . Her sister was old 1. i can be say tha she was 1 year youngest. now his old 60 years old. her sister old 60-1=59.

Annie Li
Mar 20, 2017

To do this question, we have to figure out how many years in between 60 and 2 and obviously, the answer is 58 . Next we have to figure out the sister's age which is half of two which equals to one. Now we just take the 1 and plus it with 58 which is 59 which is the answer.

when I was 5 years old my brother was still 2. then he turned 3 while I was (and I still am) 6 years old. then mama&gram turned 1 year older.

Am Kemplin - 1 month, 4 weeks ago

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terms of unknown!

Am Kemplin - 1 month, 3 weeks ago

5alarm keeps me dinking is 5 da answer too dis queston?

Am Kemplin - 1 month, 3 weeks ago

Wat da hell? 😐

Am Kemplin - 1 month, 3 weeks ago
Galen Buhain
Sep 28, 2016

The half of 2 is 1. So I am 1 year older than my sister. If I am 60 years old. Then, my sister is 59 years old

50 - 1 = 49.

Am Kemplin - 1 month, 2 weeks ago

I'm thinking about how old 59 is.

Am Kemplin - 1 month, 2 weeks ago

60 - 1 = 59

Am Kemplin - 3 weeks, 2 days ago
Monisha Gupta
Jun 5, 2016

the answer is 59 as his sister was half of her age when two means he was 1 year older than her .so now when he is 60 her sister is 1 year smaller than him which means 59

50 is a fraction of 59. so. 60 - 1 = 59.

Am Kemplin - 1 month, 2 weeks ago
Syed Abas Shah
Mar 10, 2016

Sister is one year younger than the brother

Tan ChengHong
Mar 9, 2016

他们相差1岁,所以当哥哥60岁时,妹妹则59岁。

Please write solutions in English.

Munem Shahriar - 3 years, 11 months ago

all solutions need be in English.

Am Kemplin - 1 month, 1 week ago
Ghazal Memon
Feb 13, 2016

I am Mr. X and I am 2 years old today I have a sister Miss Y, she is half of my age, mathematically it would be 2/2 = 1

It means her age is 1 year today, so lets see age difference between us:

Age of Mr. X - Age of Miss Y 2 - 1 = 1 (years) which means as we grow I would always be 1year old in age than she is Or It can be said she would always be 1 year less in age from my age.

If I become of 3 she would be 2 If I become of 4 she would be 3 ... So on If I become of 60 she would be 59 (years)

Mari B
Jan 2, 2016

x = speaker age, y = sister age, z = difference in ages

if x = 2, y= 1/2 x, y = 1/2 * 2

z = x - y = 2 - 1 = 1

y = x - z, Therefore y = x - 1

60 - 1 = y, y = 59

Hi Bye
Nov 14, 2015

1/2 x 2 = 2 So the difference is .............................................................................1 So 60-1=59

Emmanuel Adebiyi
Sep 7, 2015

Two years divided my two was her sister's age which is 1 therefore she us 1 year older than her sister now that she is 60 hersl sister's age is 60 - 1 =59

Rob Owen
Sep 7, 2015

2 x 50% = 1

60 - 1 = 59

2×50%=1 60-1=59

Am Kemplin - 1 month, 3 weeks ago
Fred Quan
Sep 4, 2015

At my age 2, half of 2 is 1. This is a moment in time where my sister is exactly one year younger then me. So at my age 60 she is 59.

if x=35 then 3+4+4-2÷25+7-0+2+3+7=t9

Am Kemplin - 1 month, 3 weeks ago
Hadia Qadir
Jul 29, 2015

X is my age, Y is my sister age, Z is difference if X = 2 and Y = 1/2 * X then: Y = 1/2 * 2 = 1 Z = X - Y Z = 2 - 1 = 1 if X = 60 then: Z = X - Y 1 = 60 - Y Y = 60 - 1 = 59

mama Mia this is so hard!

Am Kemplin - 1 month, 3 weeks ago
Kano Ravalji
Jun 25, 2015

Correct answer 59 :)

Yadira Rad
Apr 20, 2015

2x.5=1 , 60-1=59

When he was 2 2 years old his sister was 2 2 = 1 \frac{2}{2}=1 years old which is 1 1 year less then is year.As the differance in ages does not change so the sister,s age is 60 1 = 59 y e a r s o l d 60-1=\boxed{59}years\;old

Hon Ming Rou
Sep 4, 2014

She is 2 years old; her sister is 1 year old. They have a difference of 1 year. If she's 60 years old; of course her sister is 59 years old.

He is 1year older than his sister. Thus 60-1 = 59. Easy but tricky.

Alex Thang
Jul 7, 2014

She was half her age so she was 1 so when she turns 60 she should be one year younger than her which is 59. How do you get such easy problems on your mind

Sohail Tahir
Jul 4, 2014

when he is 2 year old but his sister half year old mean to say she become 1 year old when he is 60 year old then his sister who is half year older than his now she become 59 year old according to his brother age that solve

Bharath Spidy
Jul 3, 2014

Given age = 2

Half age of given age is = 1

So, she is 1 year younger than her sister.!

What ever the age might be just subtract 1 from the Age

60 - 1 = 59

Hicham Akdi
Jun 13, 2014

he's 2 she's half so his sister is one after he gets 60 she still be1 year younger so 59

Ramji Varadarajan
Jun 13, 2014

When the individual was 2 his sister was 2*1/2=1 yrs old. So when the individual was 60 yrs old his sister was 60-1=59 yrs old.

she was 1/2 his age, 2/2=1 . so, he is 1yr older to her sis when he is 60 her's 59

Shaykh Abbas
Jun 12, 2014

Very simple. When he was 2 years old her sister was one year younger to him. thats y when he was 60 years old her sister would be 1 year younger and answer is 59

Devendra Marghade
Jun 12, 2014

My age=2, so Sisters age=2/2=1

Increase in years for my age to be 60 =60-2=58

So Sister's age after 58 years= 1+58=59

Supathat Sukaiem
Jun 11, 2014

Haha.. who cannot answer within 5 sec? Raise your hands.

🙋🙋🙋🙋

Difa Sanditya
Jun 9, 2014

X is my age, Y is my sister age, Z is difference

if X = 2 and Y = 1/2 * X

then:

Y = 1/2 * 2 = 1

Z = X - Y

Z = 2 - 1 = 1

if X = 60

then:

Z = X - Y

1 = 60 - Y

Y = 60 - 1 = 59

Raghad Mous
Jun 8, 2014

X is my age, y is the age of my sister; When x=2 ; y=1 y=x-1 So when x=60; y=60-1=59 Tip: the word "Half" was a trap

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